ive still yet to see anyone complete this, a vehicle tail/head lamp sequencer similar to these ready made boards below.
anyone have pointers on how to program, build something like this?
Adafruit has just about everything there is to know about controlling WS2811/WS2812 LED strips.
If you want Bluetooth, that's a separate topic and you'll have to put them together. But Adafruit has information on that too.